The Boring Company, led by Elon Musk, received a building permit this week from the Washington, D.C. government, potentially jumpstarting the tech entrepreneur’s plan to bring a high-speed tube system between New York City and D.C. Although Musk said last summer he received “verbal” approval from officials, the new, written permit allows preparatory and excavation work to begin on a parking lot on New York Avenue in D.C., the Washington Post reported. The Hyperloop One would be able to take passengers from NYC to D.C., with stops in Philadelphia and Baltimore, in just 29 minutes via a tube moved by electric propulsion.

Just a few days ago, Elon Musk received “verbal approval” for his Hyperloop One, a high-speed tube that will take passengers from NYC to D.C. in just 29 minutes. Adding to his East Coast and New York takeover, Musk’s Silicon Valley-based company Tesla will release its first mid-priced electric car, the Model 3, later this month for the moderate price of $35,000. But because New York law requires cars to be sold to consumers by dealerships and not manufacturers, Tesla hopes proposed legislation aimed at changing that law will expand their sales dramatically throughout the state, according to Crain’s.

In a tweet around 11:00am Thursday, Tesla CEO Elon Musk said he “just received verbal govt approval for The Boring Company to build an underground NY-Phil-Balt-DC Hyperloop.” The Hyperloop One plan will take passengers from NYC to D.C. in a mere 29 minutes via a high-speed tube moved by electric propulsion, with stations at each city center and “up to a dozen or more entry/exit elevators in each city,” according to Musk. In a response to a comment on his initial tweet, he said: “First set of tunnels are to alleviate greater LA urban congestion. Will start NY-DC in parallel. Then prob LA-SF and a TX loop.”

Future New Yorkers may travel between cities faster than ever before. Hyperloop One–the California-based tech company whose transportation concept was first proposed by Elon Musk– revealed its plan for a high-speed tube that could take passengers from NYC to D.C. in just 20 minutes, reports NBC New York (by comparison, Amtrak’s Acela Express currently takes a little more than three hours). Travelers would board magnetically levitating pods that move by electric propulsion and travel at more than 700 miles per hour. This would connect 80 percent of the country, making a cross-country trip just about five hours long. According to the company, nearly 83 million people would benefit from this hyperloop between our nation’s capital and the Big Apple.